1.Early rehabilitation: Within 2 weeks after the injury, the affected limb is swollen, painful, and the fracture end is unstable and easily re-fractured or displaced. The main purpose of functional training in this period is to promote blood circulation, which is conducive to eliminating swelling and stabilizing the fracture. The main form of functional training is the static contraction of the muscles of the affected limb. That is, on the basis of joint immobility, the affected limb muscles do rhythmic static contraction and relaxation. Both we often say the force of tensing and relaxation, to prevent muscle atrophy or adhesion and relieve pain. 2.Mid-term rehabilitation: 2 weeks after the injury to the clinical healing of the fracture. The swelling of the affected limb gradually disappears, the pain is relieved, the fracture ends appear fibrous connections and gradually form bone scabs, and the fracture is stabilized. During this period, in addition to continuing the muscle contraction training of the injured limb, the functional activities of the proximal and distal unfixed joints of the fracture and the activities of the upper and lower joints of the fracture can be gradually restored under the guidance of the medical personnel and the healthy limbs, and gradually change from passive activities to active activities, increase active joint flexion and extension activities, prevent muscle atrophy, avoid joint stiffness and reduce functional impairment. If the condition allows, you should get up as early as possible to perform whole body activities. At the same time, physical therapy should be used to reduce swelling, relieve pain and promote the formation of bone scabs. The effect is better with rehabilitation equipment. 3.Later rehabilitation: That is, clinical healing or removal of external fixation, bone scab has been formed, X-ray examination has been healed, and the bone has a certain support force. However, most of the adjacent joints have decreased joint mobility, muscle function atrophy and other dysfunctions. Therefore, the purpose of rehabilitation in this period is to restore the mobility of the affected joints, strengthen the muscles, and restore the limb function. The main form of training is to strengthen the active activities of the injured limb joints and weight-bearing support exercises, so that the function of each joint can be rapidly restored to the normal range of motion and normal strength, and to pay attention to the coordination, balance and gait training of the whole body functional training. Attention should be paid to the following principles: individualized, gradual, persistent, active participation of the patient and comprehensive recovery.